After 4.8 produced a kernel panic on high network load on my Mac Mini G4 1,5 I successfully updated to 5.0 today. Many changes from 4.4, but it's still the good old OpenBSD.

The 5.0 Release Notes are mentioning a newly added feature called "Dynamic Frequency Switching" on some macppc systems. I'm wondering, how can I enable dfs or to check on which frequency the processor currently is running?

In it, you will see a description of the applicable hardware. If this driver is loaded, you will see it in your dmesg. Please also note that there is a SEE ALSO section that refers you to both a driver for on-board GPIO controllers, and to sysctl(8). I assume, therefore, that you will be able to use the sysctl hw.setperf or a similar hw.* sysctl setting.

Last edited by jggimi; 12th November 2011 at 05:41 PM.
Reason: fixed sysctl, original post was incorrect

I'm wondering, how can I enable dfs or to check on which frequency the processor currently is running?

I suspect the first place to check is dmesg(8) output, although I don't have any other information as to what to look for or how to set it if present. I suspect you will have a better chance of getting in contact with the requisite developers if you post on the project's official macppc@ mailing list. Information on subscribing can be found at the following: